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      STACKER NOTE                                         STACKER NOTE
               STACKER DRIVE DOES NOT UPDATE OR HCONVERT HANGS
                          (Applies to Stacker 4.0)
      STAC FAX  4012 (05-17-1994)
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      BACKGROUND
      
      If you upgrade to Stacker 4.0, yet do not see a gain in disk
      space, your drive may not have been updated to the Stacker 4.0
      format. Normally you will receive an error message concerning
      CHKDSK errors, or your Actual Compression Ratio (ACR) is not
      aligned with the Expected Compression Ratio (ECR). These
      conditions are covered in StacFax 4010. In some instances you may
      receive no messages, and your ACR and ECR are matched. In this
      case the HCONVERT program may not have updated your Stacker
      drive. This is probably due to excessive fragmentation on the
      drive.
      
      SOLUTION
      
         - Determine if your drive has been updated
         - Check the drive for errors
         - Defragment the drive
         - Update the drive with HCONVERT
         - Recompress the drive to obtain additional space
           
      Determine if your drive has been updated
      
       1.  Go to the Stacker directory and type: SYSINFO <enter>
       2.  The information concerning your system will be displayed in
           a text editor. Press <ALT> S, then  <enter> to bring up the
           search text screen. Type the word PHYSICAL in the space
           provided, and press <enter>.
       3.  You will see your system's drives listed. Locate the second
           column from the right titled "version".
       4.  Stacker drives will have a number in the "version" column.
           a. A "3.0" in the column means that your Stacker drive has
           not been updated to the latest format. If so, follow the
           procedures below to update your drive.
           b. A "5.0" in the column means that your Stacker drive has
           been updated, but has not been recompressed to gain
           additional space. If so, exit the editor, open the Stacker
           Toolbox, select Optimize, and then choose Full-MaxSpace.
           c. A "5.01" in the column means that your Stacker drive has
           been updated and recompressed. If you have not gained any
           space after the upgrade, see StacFax 4010.
           
      Check the drive for errors
      
       1.  From the Stacker directory type: STACKER <enter>.
       2.  Note the lines in the drive map that profile your Stacker
           drives. For example:
           Drive C was drive C at boot time [D:\STACVOL.DSK = 123.4MB]
           This shows that the C drive is a Stacker drive and that D is
           the uncompressed host drive. Write down the drive lettter
           and filename in brackets. In this example it is
           D:\STACVOL.DSK.
       3.  Run CHKDSK against the drive letter you noted in brackets in
           the previous step. If there are errors, run CHKDSK /F, or a
           disk repair utility, to correct the errors.
           
      Defragment the drive
      
       From the Stacker directory type:
           SDEFRAG /Q drive: <enter>
       where drive: is the drive letter of your Stacker drive. In this
           example it is C.
           
                                  IMPORTANT
                  Immediately proceed to the next step. Do
                           not write to the drive.
      
      Update the drive with HCONVERT
      
       1.  Insert Stacker Disk #1 into its drive and go to that drive.
       2.  Type: STACKER -drive: <enter>
           where drive: is the drive letter of the Stacker drive. In
           this example it is C.
       3.  Type:
           HCONVERT /C drive:\STACVOL.XXX <enter>
           where drive:\STACVOL.XXX is the drive and filename you wrote
           down before. In this example you would type:
           HCONVERT /C D:\STACVOL.DSK <enter>
       4.  Remove the Stacker Disk from its drive and restart your
           system to mount the Stacker drive.
           
      Recompress the drive to obtain additional space
      
      The drive should now be converted to Stacker 4.0 format. In order
      to gain additional space, open the Stacker Toolbox, select
      Optimize, and then choose Full-MaxSpace.
       
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      Copyright 1994 Stac Electronics